Now, a Cook County circuit court judge must decide if parts of that law are unconstitutional, including GPS monitoring and a rule saying trucks need to be 200 feet away from a brick-and-mortar restaurant.

Laura Pekarik of the food truck Cupcakes for Courage said the restriction has inhibited her ability to park int he city.

"It has damaged sales revenue and making it quite impossible to find parking locations," said Laura Pekarik of Cupcakes for Courage.

"We think it strikes the right balance between restaurants and food trucks and it rationally is related to other legitimate city interests such as managing pedestrian congestion on sidewalks," said Andrew Worseck of the City of Chicago Law Department.